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A law passed in 2007, Water Code Section 9130, requires the Department of Water Resources (DWR) to prepare Levee Flood Protection Zone (LFPZ) maps by December 31, 2008; the maps shall, using the best available information, identify the areas where flood levels would be more than three feet deep if a project levee were to fail. DWR used information from several sources currently available, including FEMA floodplain maps, FEMA Q3 data, USACE's 2002 Sacramento and San Joaquin River Basins Comprehensive Study, and local project-levee studies. The law also states that DWR may periodically revise the maps to include updated information when that information becomes available. DWR is implementing an aggressive multi-year program to evaluate and delineate detailed floodplains for many of the areas protected by project levees. This effort includes new topography, hydrology, hydraulic models, and floodplain maps. This information will be used to update the initial LFPZ maps. Under Water Code section 9110(b), "Levee Flood Protection Zone" means the area, as determined by the Central Valley Flood Protection Board or DWR, that is protected by a project levee. DWR delineated the LFPZs by estimating the maximum area that may be flooded if a project levee fails with flows at maximum capacity that may reasonably be conveyed. The maps should not be confused with Federal Emergency Management Agency's Flood Insurance Rate Maps used for the National Flood Insurance Program. They were prepared for different purposes and do not show the same type of flood hazard. Updated December 2023 |
| summary:
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A law passed in 2007, Water Code Section 9130, requires the Department of Water Resources (DWR) to prepare Levee Flood Protection Zone (LFPZ) maps by December 31, 2008; the maps shall, using the best available information, identify the areas where flood levels would be more than three feet deep if a project levee were to fail. DWR used information from several sources currently available, including FEMA floodplain maps, FEMA Q3 data, USACE's 2002 Sacramento and San Joaquin River Basins Comprehensive Study, and local project-levee studies. The law also states that DWR may periodically revise the maps to include updated information when that information becomes available. DWR is implementing an aggressive multi-year program to evaluate and delineate detailed floodplains for many of the areas protected by project levees. This effort includes new topography, hydrology, hydraulic models, and floodplain maps. This information will be used to update the initial LFPZ maps. Under Water Code section 9110(b), "Levee Flood Protection Zone" means the area, as determined by the Central Valley Flood Protection Board or DWR, that is protected by a project levee. DWR delineated the LFPZs by estimating the maximum area that may be flooded if a project levee fails with flows at maximum capacity that may reasonably be conveyed. The maps should not be confused with Federal Emergency Management Agency's Flood Insurance Rate Maps used for the National Flood Insurance Program. They were prepared for different purposes and do not show the same type of flood hazard. Updated December 2023 |
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>The Levee Flood Protection Zone (LFPZ) maps were developed by the State of California Department of Water Resources as required by Water Code Section 9130 to increase awareness of flood risks associated with State-Federal levees. The maps should not be confused with Federal Emergency Management Agency's Flood Insurance Rate Maps used for the National Flood Insurance Program. They are not showing the same type of flood hazard and they were prepared for different purposes. Levee Flood Protection Zone maps estimate the maximum area that may be flooded if a State-Federal levee fails with flows at maximum capacity that may reasonably be conveyed. These maps specifically focus on flood risks associated with State-Federal levees. Lands within the Levee Flood Protection Zone may also be subject to flooding due to other factors including, but not limited to, levee failure at flows less than design capacity, overtopping of a levee, drainage problems, or other types of flooding from sources on the land side of the levee. Lands not mapped within a Levee Flood Protection Zone may also be subject to flood risk.</SPAN></P></DIV></DIV> |
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LFPZBAM |
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Map Service |
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["LFPZ","2023"] |
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